Holy sprocket
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1st Gear
Joined: Feb 2007
Posts: 5
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Holy sprocket
I ride an FXDBI or Street bob, yesterday my sprocket bolts backed out and two were sheared before it locked the wheel up. Luckily I was at a light and was just rolling forward. Two years ago it happened for the first time at 75 mph with my wife on the back and all the bolts sheared off and I lost thrust (Thank God that it didn't lock up). Has anyone had this happen to them and have you ever figured out why (other than the obvious, no lock tight).
Extreme HDF Member
Joined: Sep 2006
Posts: 10,114
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From: Vancouver B.C. Canada
Yes, it happened to my last bike, I carry a 5/8 wrench in my toolbag since then, no matter how tight they are, even you use red locktite, still come loose.
READ MY THREAD HERE
READ MY THREAD HERE
Cruiser
Joined: Nov 2011
Posts: 176
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From: Berkeley, CA
Lots has been written about this issue. If you search "sheared pulley bolts", you'll have plenty of discussion to read;
https://www.hdforums.com/forum/searc...rchid=12586220
I think it's important for all of us to be edumucated about this one. Glad you didn't get locked up, wolfsden.
https://www.hdforums.com/forum/searc...rchid=12586220
I think it's important for all of us to be edumucated about this one. Glad you didn't get locked up, wolfsden.
Extreme HDF Member
Joined: Sep 2006
Posts: 10,114
Likes: 29
From: Vancouver B.C. Canada
First I thought it was the factory threads, I redid them with helicoil, supposed to be much stronger than stock but its not, still have to tighten up the bolts once in a while. My closest explanation would be coarse thread pitch, if I were the designer, I would make them fine threads instead, lot more strength. Live with it!
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1st Gear
Joined: Feb 2007
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Holy sprocket
Wow I can't beleive this is that common. I think that what 128auto said might help but I guess I am just going to have to treat this like an aircraft and do a preflight check every few rides to make sure this doesn't kill me.
Thanks guys
Thanks guys
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Joined: Dec 2009
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From: Corporate States of America
Ya, preflight check is always a good idea.
Outstanding HDF Member
Joined: Nov 2009
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From: Sonoma County, CA
Yeah That!
Plus, I took a sharpie and put a mark on each of the bolt heads that extends onto the pulley. That way I can see at a glance if they are moving. Now if they shear off, that's a different story. I won't see that one coming...
One other thing, you can call me crazy but once I have loctited and torqued the bolts, I don't go back and keep checking them. I feel that once the loctite has cured, I don't want to "break" that seal. That seems to make logic in my mind. Oh well... Cheers.
Plus, I took a sharpie and put a mark on each of the bolt heads that extends onto the pulley. That way I can see at a glance if they are moving. Now if they shear off, that's a different story. I won't see that one coming...
One other thing, you can call me crazy but once I have loctited and torqued the bolts, I don't go back and keep checking them. I feel that once the loctite has cured, I don't want to "break" that seal. That seems to make logic in my mind. Oh well... Cheers.